Industrial truck



Aug. 10 1926. 1,595,384

c. E. COCHRAN INDUSTRIAL TRUCK Original Filed April 8, 1925 PatentedAug. 10, 1926.

UNITED STATES CLYDE E.

COCHRAN, 0F CLEVELAND, OHIO,

ASSIGNOR TO THE ELWELL-PARKER ELEC- TRIC COMPANY, OF CLEVELAND, OHIO, ACORPORATION OF OHIO.

INDUSTRIAL TRUCK.

Original application led April 8, 1925,'Serial No. 21,487. Divided andthis application led November 18, 1925. Serial-No. 69,780.

This invention is concerned with load lifting and transportingmechanisms and comprises a division of the subject matter set forth inmy co-pending application per-k taining to industrial trucks, Serial No.21,487 filed Aprile, 1925.

An object of my present invention is the provision of a load elevatingmechanism having in association therewith, a novel apparatus forretaining sheet metal loads upon the load liftingmechanism. v

Further objects of my invention will hereinafter be set forth in thefollowing dcscription which refers to the accompanying drawingsillustrating a preferred form thereof. The 'essential characteristicsare summarized in the claims.

In the drawings Figure 1 is a side eleva-v ure Lfis a diagrammaticrepresentation of the electrical connections for energizing theelectromagnetic means shown in Figure 2.v

The. mechanism disclosed in the drawings .is particularly adaptable tothe handling and transporting of sheet metal-in stacks. Efforts havebeen made to handle such material by gripping the top and bottom of thestack of sheets and to thus retain it upon the truck while beingtransported. Due to the fact that when sucha stack of sheet material isengaged by the grappling or gripping mechanism, the air entrapped on thesurface of the sheets of material is squeezed or forced outwardly, thuscausing a slipping or shifting of the sheets.

In the present form of my invention I provide a load lifting mechanismwhich is adapted to be extended beneath a stack of sheets, resting uponmembers which space the bottom of the stack from the floor and thevertical movement of this load lifting mechanism causes the stack ofsheets to be elevated.

If it were desired to only elevate such stacks of sheet metal, thesheets would remain in position but in order to transport them it isnecessary to retain them upon the load lifting platform to prevent theirdisplacement,due to vibration, when the truck carrying the elevatingmechanism vis moved from place to place. I retain the vsheets upon theload lifting platform by an electromagnetic device built into the loadlifting mechanism in such manner that vertical surfaces formed on themagnet are juxtaposed to an edge of each sheet, when the sheets in thestack are being elevated.

I show in Figure 1 an upright frame comprisin channel members 10positioned with the anges thereof extending inwardly whereby a loadlifting mechanism, which includes a frame 11, may carry rollers 12 and13 to engage the flanges of the upright frame 10. The upright frame 1()is pivotally mounted at 14 to overhang and wheels 15 of an industrialtruck 16 and plate members 18 may be secured to the channel members 10adjacent the bottoms thereof. These plate members may constitute apivotal connection between the upright frame and the truck chassis.Resilient means in the form of springs 20 may bear against the truck 16at the bottoms thereof and terminate in cup shaped members 21 pivotallyconnected at 22 to extensions of the plate members 18.

The.load lifting mechanism 11, as described in my co-pending applicationreferred to, may be actuated by a cable 22 looped over a sheave 23,suitably attached to'V the load lifting mechanism to be disposed betweenthe upright members 10. rIhis cable may have one end thereof secured toa top frame member in the form of a channel 24 from which the cable mayextend downwardly to pass over the sheave 23, thence extended upwardlyand over a second sheaveV 26, suitably mounted adjacent the top of theupright frame and then to a winding mechanism, (not shown) car` ried bythe truck.

It is desired, that the load not only be elevated vertically but that italso be tilted so that the sheets can be stacked against a gaugingsurface whereby the edges of the sheets, comprising two opposite sidesof the pile or stack, will' become aligned,.and for this purpose thepivotal connection 13, already described, is provided whereby theupright frame 10 and the load elevating mechanism 11 may be tilted afterthe load has been elevated from the floor.

The tilting of the upright frame may be effected in any desired mannerand, as shown in Figure l, a cable LDal-extendingy over a sheave mountedadjacent the sheave 26, may be 'actuated by the Winding mechanismmounted on the truck frame to tilt the upright frame. I

The load lifting mechanism has attached thereto a load lifting platform,comprising a plurality of L shaped arms 35, pivotally attached to theload lifting mechanism at 36. These arms are spaced apart, as shown inFigure 3, and disposed therebetween are a pair of magnets 37, havingincorporated in their construction energizing coils 38. surfaces 39 ofthe magnets extend vertically in 'a plane spaced from the vertical faces35a of the' L shaped members 35 whereby the edges of the sheets in thestack may be decked or gaugcd against the magnet surfaces when thelifting mechanism is tilted a sufficient distance to cause the sheets toslide against the magnet faces,- or the operator, may cause a violentagitation of the upright frame bv rapid starts and stops of the windingmechanism to thus agitate the sheets. The electromagnetic coils 38 maybe connected to battery B of the industrial truck, by a line 40 and aline 4l controlled by a switch 42 suitably disposed adjacent theoperators position on the truck.

The operationy of the mechanism is as follows:

Assuming a stack of'sheets are positioned upon spaced apart membersresting upon the floor, the truck is maneuvered to bring the arms 35-between the stack supporting members. The load is raised 0H of thesupporting members by 'actuation of the load lifting mechanism 11through the taking in of the cable 22 by the Winding mechanism to causethe load to be raised in a vertical direction. The operator may thenstart the transporting movement of the truck and while doing so, causethe upright frame 10 to be tilted by taking in the cable 30 and bymanipulating the cable 30. the upright frame may be violently joggedthrough the influence of the springs 2() and the Winding mechanism, thuscausing the sheets to be stacked against the surfaces of the magnets 37.The operator may then close the switch 42 to energize the magnets 'andthus cause the sheets to be held in stacked condition on the truckduring the transporting movement thereof.

I claim:

l. In combination a load elevating means including an elevatortraversing an upright frame and having a vertically movable loadsupporting surface and electrically energized magnetic means formaintaining a me- The tallic load upon said load supporting surace.

2. In combination a load tilting means including an elevator traversingan upright frame and having a vertically movable load supporting surfaceand electrically energized magnetic means for maintaining a metallicload upon said means when it is being tilted.

3.'In combination a load engaging and lifting means including anelevator traversing an upright frame and having a vertically movableloady supporting surface and magnetic means comprising a part of theload lifting means and disposed thereon to maintain a metallic load uponsaid load supporting surface.

Ll. In combination a load elevating means having a vertically movableload support upon which the load may be placed including an elevatortraversing an upright frame and electrically energized magnetic meanscarried by the load support and disposed to maintain a metallic loadupon said load support when the load is being elevated.

5. In combination a. load tilting means having a vertically movable loadsupport, said means being mounted adjacent an end of an industrial truckframe and electrically energized magnetic means on the load support andadapted to iniuence a metallic load to maintain it on the support whenit is being elevated and tilted.

6. In an industrial truck the combination of a vertically movable loadelevatingl means mounted at one end thereof including a tiltable uprightframe, means for actuating said load engaging means and an electricallyenergized magnetic means carried by the load engaging means formaintaining a. metallic load upon said load supporting surface.

7. In an industrial truck, the combination of a load elevating meansmounted at one end of the truck, said load elevating means including anupright frame, a load lifting platform, a carriage mounted upon theupright frame to traverse the same and to which the load liftingplatform is attached, an electrically energized magnet attached to thecarriage, said magnet having substantially vertically extending facesextending from the surface of the load lifting platform upwardly alongthe carriage.

8. In an industrial truck, the combination of a load elevating meansmounted at one end of the truck, said load elevating means includin anupright frame formed of chan- .nel mem ers having the ianges thereoffacmagnet attached to the carriage, said ma et having substantiallyvertically exten ing faces extending from the surface of the loadlifting platform upwardly along the carria e.

9g In an industrial truck'of the character described, the combination ofAan upright frame, a vertically movable carriage mounted upon theupright frame, a load lifting platform comprising a plurality of spacedapart L shaped arms, and an electrically energized magnet member securedto the car- 'ill , member member riage between said arms.

10. In an industrial truck of the character described, the combinationof an upright frame, a vertically movable carriage mounted upon theupright frame, a load lifting platform comprising a plurality of spacedapart L shaped arms pivotally attached to the carriage, and anelectrically energized magnet member secured to the carriage betweensaid arms. Y

11. In an apparatus of the character described, the combination of anindustrial truck chassis, an upright frame pivotally attached tooverhang one end of the chassis,

said upright frame having inwardly extending members attached theretoaffording pivotal connection to said chassis, a resilient mounting and`said chassis for maintaining the frame in an upright position, avertically movable carriage mounted on the upright frame and adapted tobe lowered to the Hoor o'r sup orting medium of the truck,

a load lifting p atform mounted on the carriage, and an electromagnetmounted on the carriage in juxtaposition to the load liftingl platform,said electromagnet having a load engaging surface extendingsubstantially at an an le to the load engaging surface of the loadlifting platform. i

12. In an apparatus of the character -described, the combination of anindustrial truck chassis, an upright frame pivotally attachedtooverhanlg one end of the chassis, said upright frame aving inwardlextending members attahed thereto affor ing pivotal connection to saidchassis, a resilient disposed between said pivotal mounting andvsaidchassis for maintaining the frame in an upright position, a verticallymovable carriage mounted on the up right frame and adapted to be loweredto the ioor or supporting medium of the truck, a load lifting plat-formmounted on the carriage, and an electromagnet mounted on disposedbetween said pivotal ter described, the combination Yof'a truck' frame,an upright frame pivotally mounted at one end of the truck frame tooverhang said end thereof, said pivotal mounting being substantiallyabove a pair of wheels of the truck, resilient means reacting on thetruck.

frame and attached yto the upright frame in offset relation to saidpivotal mounting, a carriage adapted to traverse Asaid u right frame, ahorizontally disposed load iifting platform mounted on the carriage, anelectromagnet also mounted on the carriage, the load lifting platformhavin a surface substantially normal to a loa engaging `surface of themagnet, means for elevating the carriage, means for tilting the upri htframe whenpthe carriage is elevated wit thereon to cause the load to bebroughtinto engagement with the load engaging surface of the magnet, abattery and electricalY connections-extending between the Tbattery andthe electroma net for energizing-the magnet when the loa has beenbrought into engagement with the surface thereof consequent' to thetilting of the upright frame.v

14. In an industrial truck of; the charac-v ter described, thecombination of a truck frame, an upright frame pivotally mounted at oneend of the truck frame to overhang said end thereof, resilient meansreactin on the truck frame and attached to the-upright frame in offsetrelation to said pivotal mounting, a carriage adapted to traverse said uright frame, a horizontally disposed load liftin platform mounted on thecarriage, an e ectromagnet lalso mounted on the carriage, means forelevating the carriage, means for tiltin the upri ht frame when thecarriage is e evated wit a load thereon to cause the load to be broughtinto en agement with the load engaging-surface o the magnet, a batteryand electrical connections extending between the battery andtheelectromagnet for energizing. the magnet when the load has been broughtinto engagement with the surface thereof consequent to the tilting ofthe upright frame.-`

In testimony whereof, I hereunto aiix my signature.

